Lisbon to Tehran Time
WET to IRST Converter — 9 AM WET is 12:30 PM IRST
Lisbon is 3 hours and 30 minutes behind Tehran. Convert any time between Lisbon (WET/WEST) and Tehran (IRST/IRDT) instantly.
Lisbon
Portugal
Tehran
Iran
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Time Zone Comparison
Lisbon to Tehran Time Conversion Table
| Lisbon (WET) | Tehran (IRST) |
|---|---|
| 12:00 AM | 2:30 AM |
| 2:00 AM | 4:30 AM |
| 4:00 AM | 6:30 AM |
| 6:00 AM | 8:30 AM |
| 8:00 AM | 10:30 AM |
| 10:00 AM | 12:30 PM |
| 12:00 PM | 2:30 PM |
| 2:00 PM | 4:30 PM |
| 4:00 PM | 6:30 PM |
| 6:00 PM | 8:30 PM |
| 8:00 PM | 10:30 PM |
| 10:00 PM | 12:30 AM |
Lisbon & Tehran — Business & Scheduling Guide
Lisbon (Portugal) is an important regional economy, with key industries in diverse sectors including services and trade. Tehran (Iran) is an important regional economy, known for diverse sectors including services and trade. With a 3.5-hour time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.
Scheduling Meetings Between Lisbon and Tehran
The 3.5-hour difference between Lisbon and Tehran requires careful scheduling. The best overlap window is typically 2–4 hours when both cities are within working hours. Business hours typically follow a 9 AM–5 PM schedule. Business hours typically follow a 9 AM–5 PM schedule. Teams often designate specific "overlap hours" for real-time collaboration and use asynchronous communication (Slack, email, recorded video) for the rest of the day.
Daylight Saving Time Considerations
Both Lisbon and Tehran observe Daylight Saving Time. Lisbon uses WET/WEST (switching between standard and daylight time), while Tehran uses IRST/IRDT. If their DST transitions happen on different dates — which is common, as the US, EU, and other regions change clocks on different weekends — the effective time difference between the two cities can shift by 1 hour for several weeks. Always double-check the actual offset during March–April and October–November.
WET to IRST — Quick Reference
WET (WET/WEST) stands for the timezone used in Lisbon, Portugal (UTC+0). IRST (IRST/IRDT) is the timezone used in Tehran, Iran (UTC+3:30). Lisbon is 3 hours and 30 minutes behind Tehran.
To convert WET to IRST, add 3.5 hours to WET time. For example, WET 9:00 AM = IRST 12:30 PM.
Key Facts
- •Time difference: Lisbon (UTC+0) is 3 hours and 30 minutes behind Tehran (UTC+3:30).
- •Daylight Saving Time: Lisbon observes DST (WET/WEST). Tehran observes DST (IRST/IRDT).
- •Regions: Lisbon is located in Portugal and uses the WET/WEST time zone. Tehran is located in Iran and uses the IRST/IRDT time zone.
- •Best time to call: The best time to call between Lisbon and Tehran is 9:00 AM to 1:00 PM in Lisbon time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Lisbon and Tehran?
Lisbon is 3 hours and 30 minutes behind Tehran.
What time is it in Tehran when it's 9 AM in Lisbon?
When it's 9:00 AM in Lisbon, it is 12:30 PM in Tehran.
What time is 9 PM WET in IRST?
9 PM WET (Lisbon time) is 12:30 AM IRST (Tehran time). This is a common time people check when scheduling evening calls across these two time zones.
When is the best time to schedule a meeting between Lisbon and Tehran?
The best time to schedule a meeting is between 9:00 AM to 1:00 PM in Lisbon time, when both cities are within standard working hours (9 AM – 5 PM). This gives you the maximum overlap window for real-time collaboration.
How do I convert WET to IRST?
WET (WET/WEST) is the timezone for Lisbon, Portugal (UTC+0). IRST (IRST/IRDT) is the timezone for Tehran, Iran (UTC+3:30). Lisbon is 3 hours and 30 minutes behind Tehran. Quick examples: 9 AM WET = 12:30 PM IRST, 12 PM WET = 3:30 PM IRST, 3 PM WET = 6:30 PM IRST, 6 PM WET = 9:30 PM IRST.
Is Lisbon ahead of or behind Tehran?
Lisbon is 3 hours 30 minutes behind Tehran. When it's noon in Lisbon, it's 3:30 PM in Tehran.
Does Lisbon or Tehran change clocks for Daylight Saving Time?
Yes, Lisbon observes DST and switches between WET/WEST. Tehran observes DST and switches between IRST/IRDT.
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